Httghes



N. CABRlCO.

METHOD OF'MENDING ELECTRICRESISTANCE ELEMENTS. APPLICATION msn SEPT.11,1920.

1,399,420. Patented Dec. 6, 1921.

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. sometimes becomesqbrokenirom misuse or Zo all whom t may concern:

vtric Resistance Elements, :of .which the fol- "II-ATENT :OFFICE- 'Nonno/ARRIGO, or srnNnY,'MONTANAQSSIGNOR on ONE-Hann jro'FnA'NK o.

' HUGHES, OFl EVANSTON, ILLINOIS.

' METHOD or MENDING- nrnofrnro nnsrsrnncn; nLnMENTs.' f

Be itknown thatI, NoniJ Caniuco, a citil. zen of the United States, residing at Sidney, in the county fof Richland and State of Montana, `have invented a new anduseful Improvement in' Methods of Mending Eleclowingis .a specification.

This invention relates to improvements in mending electric resistance elements and applies zI noreparticularly to those-resistance elements, commonly used for heating in electric; heaters,. toas,ters and .the like, which4 are most. Jfrequently;made of 'a wire (usually. an alloy-pf nickelg and; chromium) `formed into a jhelixprgspiral withfconvolutions. It is well known thatfsuchi an, element unusual strains, or. burns. outL at a weak; or thilnw;point,Y before-the; usefulness: oftheA element-,as afyvhole has. expired. .By' theuseot` my .invention an element so i broken canbe quickly, easily andqcheaplymended; so as to restorev its formemusefulness, thus Agreatly nrolenginaits life.; 1,.' The .invention is` illustrated in thedraw'- ing, 'Q;-..which .Figure l. shows a; resistance ,element placeiin; its if inounting.v with: the nishedfrepairrFig. 2 is a plan view ofthe broken element before repair,-Fig. 3 shows thetirststeps-in the makinglof therepair, Fig. shows..theapplicationv of theflux, Fig.' 5 is a section on the line 5 of Fig. 2, and Fig. 6 is an enlarged section of the wires at fthe-'point ofirepair. Tf

In the practice of my invention, the broken' ends 7 and S of the resistance element are overlapped and the convolutions of the helix interlocked or interlaced (Fig. I prefer to interlock two or three convolutions of each end, although more or only one may he used. No particular manner of interlocking or interlacing the ends is required, as long as they are sufficiently hooked together to prevent separation. In overlapping the ends, the stretching of the elements will cause the convolutions or" which they are formed to act as springs and give a slight tension thus assisting in holding together` the interlocked ends. After the broken ends have been thus interlocked, I cover them with powdered borax 9 (Fig. 4). I prefer to use partially dehydrated borax as it is more adherent, and by its use excessive intumescence is avoided during the rest of Specificationl of Letters Patent.

.- a'sfh'as been heretofore're'quiredff Patented Dc. 6, 1,921.

Application filed September 11;' 1920. Serial No. 409,660.

--the process. -ltough I have statedithat I use boren', it is obvious that, without detracting fromv the. spirltorn my invention, other substances may be used instead. AFor example, any alkali similar to boraX or anyJsuitable fluxmaybeused. After the applica- .tion of the borax to cover the interlocking of the broken ends, the normal operating current customarily used through vthe resistance element is turned on, whereupon the broken ends-will become united.' f

At times: the quantity of cnr-rent'owing throughithe repair: may somewhat tinf creased byvl short-circuiting some/of the coils. I-Iowever, by theyuse of 'my"invention f the element .while in place in.'r the mounting may be quickly repairedlusin ftheno'rm'allcurfrrent,z'. e., that-reachingt -ede'vfice through its regular"y leads andi without makingany special connections?- r'lfhisl isf fhighlyfimpor- -tant yparticularly f lwithfheavylf translators :like domestici ranges which 1 can'f--be f restored itoausefulness -withoutlremovinir't Y g 5'element @Although I haveldescribed'certain embodiments of my invention it is to be understood that Ait is capable f Koffi many f variations "and modifications.; and. it! must,` therefore *I not be Ilimited except as *the appended lclaims, ing-.which :it:l isfmy intention-'Ito -claim `--all novelty: inherent in"myl'invention,-not dis'- closed in thegpriorart. U if .'WhatI claim as new, anddesiretofsecure byfLettersPatent i'siT j rl'f heli''all'wire electric resistance element by hooking together the broken ends and passing through the element the normal operating electric current.

y 2. The method of monding a helical wire electric resistance element by hooking together the broken ends, applying a flux and passing through the element the normal operating electric current.

3. The method of mending a helical wire electric resistance element by hooking the end convolution at one of the broken ends with the end convolution at the other broken end, applying a flux and passing through the element the normal operating electric current.

4. The method of mending a helical wire electric resistance element by interlocking a plurality of convolutions at one of the broken ends with a plurality of convolutions ico at the'otlier broken end, pplying 'e fluir and passing throuoh the element Vthelnormalo pc1ating""electr1c'current;

5. The method o electric resistance elernentmby ...overlapping and contacting' the" broken ends, pl'ilying flux, .and pessime thleileh the elemenmhe. normal'opertind'elctriccurrentf 6. The method, ofzmending aghelicalnvire electric resistance element by overlapping ff; and*I -interlockingiz t-lie [broken ends-iapplying V2l-V :lufX .al-11d:passingi thnogh,v the elementthe lfnormailinperating.electriccurrentf- -rf- 1 1- I 1 7;. .The method-ofI mendingm: zhelicalzfwire lctriceresistance element loy eitendingf the oonyolgutionsiat. the .broken' ends tor overlap thesimep .contacting the same, yapplying "a Aand passing throughthe,'.eleinen't the llol'mbliplai Tl'electricicul'rentyf if@ i 'i i:

:iE-.of :mending aehelioal wire electric resistance element exftendingfthe l-conyolutions-.fat Ether-broken endsftaove'rlap the sfnef,l hookin' tlaeend: convolution at'oiie ofthe broken :en lesifivfith;the, end; convolution 25 -4at the other: broken endfapplyin'g adiux' and P,SSng' thlzough .the elementl thel normal' op- .La-,t'f lleCtIJ-.C-CllrieDJ-,fffny ffiif v 13; Qahepmethod .OfiK Dendingm lielicl. Wire electric-resistance elememtrby--extending the niending 'a lielicl Wir'e' en gli: lea;

YVoverlnp'pingr the broken ends; interlocking the trwo end convolutions,VV .afpplyingfa flux nncl'pasvsing thigoughthe 'elenrient tli'e'norm al operating :electric current.

electric'iesistnceelement by extending the honyohlutions. to put :L tension ,onthe.same,

vrlpping the broken ends, interlocking it plura-lity-oi comzolutions et one of the ends with a plurality of convolutions at` the other end, applyinge fluxand passing through4 the element' the .I iorlna-loperai-ting' electric Acuril' I y' A ''fv 13; Themetliod of niendinghelical -wire electric: resistencia element' by I'nrtendin'g the convolutions td' fpu't atension 'on 'the' fsa'rne, oerlpping l"and interlocking 'the'broken ends, applying .a flux zin'df 'passing through the 1ele1nent the-2nrmal f oper'ting electric curiellltk feieyrfif.. f: l e' emHEhe method of* joining two'pats of a. -helica zwireffeleqtrefresistaneeelement by fstretchirrg t'lielsafef tow "ti tensr-on theni, foverlfappilngwndfief @cking-@heenweplyng: annui.' endfp'aeing :through thetwo 7c parts thef operting'eleetri: cur-rent norlnlly msedfwithftheeremem. fari wfa l'ifThe `method#-offin'ieriiingt a 'electric zresstance element iplce f bringing-thi! fbrokenl 'I'dsf in contact `an` passin-gia through-grille vl'ement-i -the 'current which nornriedlyfi operates; the 'tfrnsla' mhichrthelelemenefisiwparts 1,' 'L'.llhe :Fmeth'odrffmendi'ng electric resistance element in plaeeinv-fitsinonting -byf bringing' the"b1oken endsfinfcontact, 41p- -plyin-gl im flnirtofthe fof contact; 'nd qirissinrgj thronl'ghrfthe'f element :the jciiie'nt which nor-mali .l l op'erte's f lthe ltr-anslatoijl "of which theelein'ent'is al'pzirt. lfffff,- Inf testimony. whereof, V1I have 'hereunto'set my 'hand nnd'seal 'this V'31stv day of' August, n. 1111920: y 1v '":nonL'eii/Rnico. [efe-.3 

